Use ionicons-api version provided by bom (#456)

Author: NotMyFault

pom.xml

@@ -50,7 +50,6 @@
         <dependency>
             <groupId>io.jenkins.plugins</groupId>
             <artifactId>ionicons-api</artifactId>
-            <version>31.v4757b_6987003</version>
         </dependency>
         <dependency>
             <groupId>io.jenkins.plugins</groupId>
@@ -200,7 +199,7 @@
             <dependency>
                 <groupId>io.jenkins.tools.bom</groupId>
                 <artifactId>bom-2.346.x</artifactId>
-                <version>1670.v7f165fc7a_079</version>
+                <version>1678.vc1feb_6a_3c0f1</version>
                 <scope>import</scope>
                 <type>pom</type>
             </dependency>